Chain 72 and close (check before closing, if it fits around your head. Chain more or less when needed.
Chain 1, 1 sc in each stitch to end of round, slip stitch to chain 1 to join. Repeat till desired height of the cuff

I knitted the cuff, 2 knit 2 purl.

Now we start the puff stich:

Yarn over, Insert hook into indicated stitch
repeat till 5 loops are on your hook yarn over again and draw the yarn through all the loops on the hook.
This completes the puff. Chain 1 to secure
the stitch.
That´s the puff!

Puff-Tutorial but I made the experience, that 7 loops are too puffy :-)

Puff stich 12 rows or 19cm measured without the cuff.
Next row decrease, leave every third stich,

from the next row stich just every second until 3 puffs or height 25cm, sew up, done!